Astronomy Picture of the Day . ... The picture is actually composed from two images recorded weeks apart by the Voyager 2 spacecraft during its visit to the Saturnian System in August of 1981. ... Tuning in to the center of our Milky Way galaxy, radio astronomers explore a complex, mysterious place. ... The orbiting Compton Observatory's BATSE instrument quickly relayed the burst's approximate location to fast-slewing, ground-based cameras primed to search for an elusive optical flash. ... January . ...